<title>A simple canvas game</title>
<meta charset="utf-8">
<style type="text/css">
  body {margin:0; padding:0; wdith:100%; height: 100%}
  canvas {display:block; background-color:#000; margin:0 auto;}
</style>
<body>
  <script src="js/common.js"></script>
  <script src="js/game.js"></script>
</body>